2015 Subaru WRX Review


If you're looking for cheap speed and standard all-wheel drive, the redesigned-for-2015 Subaru WRX is still your go-to — but as you go, make sure you do so with the six-speed manual. Cars.com reviewer Kelsey Mays lamented how the newly optional continuously variable automatic transmission tamed the sedan too much in efficiency mode, and it really only gnashed its teeth in the performance-minded Sport Sharp setting. The WRX has its drawbacks as a daily driver, but for less than $27,000, including a destination fee, you'd be hard-pressed to find better performance for the price.

2015 Subaru WRX Expert Review

Cars.com photo by Evan Sears



From the review:
"Subaru's all-wheel drive splits power 50/50 percent (front/rear) in cars with manual transmissions through a simple viscous coupling, and 45/55 percent through a more sophisticated electronic split in cars with the CVT...Both systems can divert full power to one axle or another."

I don't understand this: a viscous coupling is capable of sending 100% of power to a single axle? Is this true?


The manual transmission has a 50/50 split bevel gear center differential, that has a viscous coupling clutch on that.
The only time you'd have 100% transfer is the extreme case of 'hump' mode where the differential is effectively locked out.
The automatic uses a 45/55 double planetary differential with a computer regulated lockup clutch pack. That can do full lockup, if need be.

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